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Earnings (Loss) per Share - Additional Information (Detail)
In Millions, unless otherwise specified |
3 Months Ended |
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Mar. 31, 2014
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| Equity [Abstract] | |
| Conversion of common stock shares | Class B common stock is a contingently convertible security which is convertible to Class A common stock on a one-to-one basis on the later of December 31, 2014 |
| Anti-dilutive securities excluded from computation of earnings per share | 16.2 |